When to Use Back-up Rings
- System operating pressure exceeds the limitations of the seal’s extrusion resistance.
- Pressure spikes in the system exceed normal operating conditions,risking damage to the seal.
- The use of wear rings has increased the extrusion gap, reducing the seal’s pressure rating to an unacceptable level.
- The system temperature is high enough to lower the seal’s extrusion resistance to an unacceptable level.